This publication is a compilation of strategic communications, biographies, and maps relating to the Mexican-American War. The Mexican-American War was an armed military conflict between the United States and Mexico from 1846 to 1948 after the 1845 U.S. annexation of Texas. Mexico did not recognize the secession and subsequent military victory by Texas in 1836; it considered Texas a rebel province. In the United States, the war was a partisan issue, with most Whigs opposing it and most southern Democrats, animated by a popular belief in the Manifest Destiny, supporting it. In Mexico, the war was considered a matter of national pride. The most important consequence of the war for the United States was the Mexican Cession, in which the Mexican territories of Alta California and Santa Fe de Nuevo Mexico were ceded to the United States under the terms of the Treaty of Guadalupe Hidalgo. In Mexico, the enormous loss of territory following the war encouraged the government to enact policies to colonize its northern territories as a hedge against further losses. The strategic communications date from 1 March 1845 to 4 July 1848. The biographies are of President James K. Polk, President Zachary Taylor, General Winfield Scott, and General Antonio Lopez de Santa Anna. The 19 maps show the locations of numerous battles.